Pouring structure for improving defects of slag eyes by advancing fire

Abstract

This utility model relates to the field of metal casting technology and discloses a casting structure for improving slag hole defects through preheating. It is characterized by comprising: a top gating, a riser, a gating system, and a mold cavity. The gating system consists of a vertical main gating, a bottom inner gating, a horizontal gating, a side gating, and an arc-shaped gating. Based on the horizontal gating, two horizontal gating systems are provided, with side gating at both ends. This utility model provides a solution by changing the traditional direct-pump preheating method (where the gating nozzle faces the mold cavity) to side preheating. This allows the molten metal to be smoothly injected into the mold cavity from the side of the cylindrical riser via the arc-shaped gating, completely avoiding direct impact of molten iron on the mold cavity wall and eliminating slag hole defects caused by impact at the source. Simultaneously, the arc-shaped gating is designed with a low-position inlet and a high-position riser, creating a height difference that slows the flow rate of the molten metal, reduces the impact force on the mold cavity, lowers the slag hole defect rate, and improves the internal density of the casting.

Description

Technical Field

[0001] This utility model relates to the field of metal casting technology, and in particular to a casting structure for improving slag hole defects during preheating. Background Technology

[0002] The existing casting structure is shown in the attached figure. Figure 4 As shown, its design flaws mainly lie in the connection between the inlet and the cavity tube opening. In the traditional process, the inlet is directly opposite the cavity tube opening for molten metal pouring. This will violently erode the sand coating on the inner wall of the cavity, causing local sand to fall off and forming sand erosion defects. The sand particles mix with the molten metal, resulting in a rough tube opening surface and forming slag holes on the casting surface. Even if it is repaired, the sand particles need to be cleaned and welded, which is a lot of work and the quality after repair is difficult to guarantee. Utility Model Content

[0003] The purpose of this invention is to provide a casting structure that improves the slurry slag hole defect by improving the slurry slag hole defect, so as to solve the problem of high slurry slag hole defect rate.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a casting structure for improving slurry slag hole defects during heat treatment, characterized in that it includes: a top gating, a riser, a gating system, and a cavity, wherein the top gating is located at the center of the overall structure, the gating system is composed of a vertical main gating system, a bottom inner gating system, a horizontal gating system, a side gating system, and an arc-shaped gating system, based on the horizontal gating system, two horizontal gating systems are provided, side gating systems are provided at both ends of the horizontal gating system, a bottom inner gating system is provided between the horizontal gating systems, both ends of the bottom inner gating system are connected to the horizontal gating system, the bottom inner gating system is provided with a top gating and a vertical main gating system, the top gating is connected to the vertical main gating system, and is used to vertically transport molten metal downwards.

[0005] Optionally, the riser includes a cylindrical riser, an edge riser, and a sidewall riser, used for feeding, slag collection, and venting.

[0006] Optionally, the sidewall riser is located in the middle of the side runner, one side of the sidewall riser is connected to the cavity sidewall, and the edge riser is located at the edge port around the cavity.

[0007] Optionally, the lower end of the vertical main gating is connected to the bottom ingate, and the connection point is the center point of the bottom ingate.

[0008] Optionally, one end of the arc-shaped gating is connected to the side gating, and the other end is connected to the side of the cylindrical riser, for introducing molten metal from the side into the cylindrical riser and then into the mold cavity.

[0009] Optionally, the height of the connection end between the arc-shaped gating and the side gating is lower than the height of the connection end with the cylindrical riser, forming a height difference.

[0010] Optionally, the edges of each gating system are rounded to optimize the flow pattern of the molten metal.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] This invention replaces the traditional direct-flow injection method (where the nozzle faces the mold cavity) with side injection, allowing molten metal to be smoothly injected into the mold cavity from the side of the cylindrical riser via an arc-shaped gating system. This completely avoids the direct impact of molten iron on the mold cavity wall, eliminating slag defects caused by impact at the source. At the same time, the arc-shaped gating system is designed with a low-position injection point and a high-position riser, creating a height difference that significantly slows down the flow rate of the molten metal, reduces the impact force on the mold cavity, promotes slag to float to the riser, greatly reduces the slag defect rate, and improves the internal density of the casting. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the casting structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the flow direction of the molten metal in this invention.

[0016] Figure 4 This is a schematic diagram of the overall structure of the prior art of this utility model.

[0017] In the diagram: 1. Top gate; 2. Vertical main runner; 3. Bottom ingate; 4. Horizontal runner; 5. Side runner; 6. Curved runner; 7. Cylindrical riser; 8. Edge riser; 9. Sidewall riser. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] The existing casting structure is shown in the attached figure. Figure 4As shown, its design flaws mainly lie in the connection between the inlet and the cavity tube opening. In the traditional process, the inlet is directly opposite the cavity tube opening for molten metal pouring. This will violently erode the sand coating on the inner wall of the cavity, causing local sand to fall off and forming sand erosion defects. The sand particles mix with the molten metal, resulting in a rough tube opening surface and forming slag holes on the casting surface. Even if it is repaired, the sand particles need to be cleaned and welded, which is a lot of work and the quality after repair is difficult to guarantee.

[0020] This utility model provides, for example Figures 1 to 4 The technical solution shown is a casting structure for improving slag hole defects during heat treatment, characterized in that it includes: a top gating 1, a riser, a gating system, and a cavity, wherein the top gating 1 is located at the center of the overall structure, the gating system is composed of a vertical main gating system 2, a bottom inner gating system 3, a horizontal gating system 4, side gating systems 5, and an arc-shaped gating system 6, based on the horizontal gating system 4, the horizontal gating system 4 is provided with two horizontal gating systems 4, the two ends of the horizontal gating system 4 are provided with side gating systems 5, the bottom inner gating system 3 is provided between the horizontal gating systems 4, the bottom inner gating system 3 is internally connected to the horizontal gating system 4, the bottom inner gating system 3 is provided with the top gating 1 and the vertical main gating system 2, the top gating 1 is connected to the vertical main gating system 2, and is used to vertically transport molten metal downward.

[0021] Two horizontal runners 4 are symmetrically arranged, and the bottom ingate 3 and the horizontal runner 4 intersect in the middle of the horizontal runner 4. The gating system achieves synchronous filling of molten metal through symmetrical flow splitting design. The central arrangement of the intersection node effectively balances the cavity pressure distribution, while avoiding turbulence or air entrapment at the runner joint.

[0022] The risers include cylindrical risers 7, edge risers 8, and sidewall risers 9, which are used for feeding, slag collection, and venting.

[0023] The sidewall riser 9 is located in the middle of the side runner 5, and one side of the sidewall riser 9 is connected to the sidewall of the cavity. The edge riser 8 is located at the edge port around the cavity.

[0024] The lower end of the vertical main gating 2 is connected to the bottom inner gating 3, and the connection point is the center point of the bottom inner gating 3.

[0025] The top gating 1 and the vertical main gating 2 are located at the center of the bottom inlet gating 3, which facilitates the flow of molten metal to both sides of the bottom inlet gating 3 after it is delivered to the lower end of the vertical main gating 2.

[0026] One end of the arc-shaped gating 6 is connected to the side gating 5, and the other end is connected to the side of the cylindrical riser 7, which is used to introduce molten metal from the side into the cylindrical riser 7 and then into the mold cavity.

[0027] The height of the connection end between the arc-shaped gating 6 and the side gating 5 is lower than the height of the connection end with the cylindrical riser 7, forming a height difference.

[0028] The liquid flow in the side runner 5 is buffered and turned by the arc runner 6, which can not only effectively disperse the fluid kinetic energy and reduce the vertical impact force on the sand mold 7 at the nozzle, thus protecting the integrity of the cavity, but also significantly reduce the risk of turbulence caused by sudden changes in flow rate. The optimized laminar flow state helps to reduce slag entrainment and bubble generation, thereby improving the internal density and surface finish of the casting, and increasing the casting qualification rate by 15%-20%.

[0029] The edges of each gating system are rounded to optimize the flow pattern of the molten metal.

[0030] The following description, in conjunction with a preferred embodiment, illustrates the content involved in the above embodiments.

[0031] The molten metal is vertically injected from the top gate 1, conveyed downwards through the vertical main gating 2, and reaches the center point of the bottom inner gating 3. It then branches off to the symmetrical horizontal runners 4, flowing evenly into the side runners 5. As it flows through the side runners 5, the molten metal is again branched off; one portion flows to the side wall riser 9, intercepting some sand particles before entering the mold cavity, while the other portion flows smoothly from the lower end of the side runner 5 to the upper end of the cylindrical riser 7 via the arc-shaped gating 6. As the flow rate naturally decreases, the molten metal is finally smoothly injected into the mold cavity from the side of the cylindrical riser, completely preventing molten iron from directly impacting the mold cavity wall. During the bottom-up filling process, the molten metal rises to the cylindrical riser 7 and the edge riser 8, where gas is effectively discharged, and the risers continuously provide feeding. All runners are rounded to ensure stable flow throughout the process, significantly reducing the probability of slag hole defects.

[0032] This invention replaces the traditional direct-flow injection method with side injection, allowing molten metal to be smoothly injected into the cavity from the side of the cylindrical riser via an arc-shaped gating system. This completely avoids the direct impact of molten iron on the cavity wall, eliminating slag defects caused by impact at the source. At the same time, the arc-shaped gating system is designed with a low-position injection point and a high-position riser, creating a height difference that significantly slows down the flow rate of the molten metal, reduces the impact force on the cavity, promotes slag to float to the riser, greatly reduces the slag defect rate, and improves the internal density of the casting.

[0033] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0034] The specific embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cast structure for improving the defects of slag eyes in a pour, characterized by, include: The top gate (1), riser, gating, and cavity are provided. The top gate (1) is located at the center of the overall structure. The gating consists of a vertical main gating (2), a bottom ingate (3), a horizontal gating (4), a side gating (5), and an arc gating (6). The horizontal gating (4) is the base. There are two horizontal gatings (4). Side gatings (5) are provided at both ends of the horizontal gatings (4). The bottom ingate (3) is provided between the horizontal gatings (4). The bottom ingate (3) is connected to the horizontal gatings (4) at both ends. The bottom ingate (3) is provided with a top gate (1) and a vertical main gating (2). The top gate (1) is connected to the vertical main gating (2) and is used to vertically transport molten metal downwards.

2. A foundry structure for improving the slag eye defect of a flash according to claim 1, characterized in that: The risers include cylindrical risers (7), edge risers (8), and sidewall risers (9), which are used for feeding, slag collection, and venting.

3. A foundry structure for improving the slag eye defect of a flash according to claim 2, wherein: The side wall riser (9) is located in the middle of the side runner (5), one side of the side wall riser (9) is connected to the side wall of the cavity, and the edge riser (8) is located at the edge port around the cavity.

4. A foundry structure for improving the slag eye defect of a flash according to claim 3, wherein: The lower end of the vertical main gating (2) is connected to the bottom inlet gating (3), and the connection point is the center point of the bottom inlet gating (3).

5. The casting structure for improving slurry slag hole defects according to claim 4, characterized in that: One end of the arc-shaped gating (6) is connected to the side gating (5), and the other end is connected to the side of the cylindrical riser (7), which is used to introduce molten metal from the side into the cylindrical riser (7) and then into the mold cavity.

6. The casting structure for improving slurry slag hole defects according to claim 5, characterized in that: The height of the connection end between the arc-shaped gating (6) and the side gating (5) is lower than the height of the connection end with the cylindrical riser (7), forming a height difference.

7. The casting structure for improving slurry slag hole defects according to claim 1, characterized in that: The edges of each gating system are rounded to optimize the flow pattern of the molten metal.

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